Contribution of Parker and Product indexes to evaluate weathering condition of Yellow Brown Forest soils in Japan

Souri, Bubak; Watanabe, Makiko; Sakagami, Kan-ichi

doi:10.1016/j.geoderma.2005.02.007

Cited by 33 publications

(12 citation statements)

References 19 publications

(19 reference statements)

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“…Based on the principles of soil genesis, alkali and alkaline earth metals (Na, Mg, K and Ca) move through the soil horizons before the silicium fraction as the weathering process continues (Souri et al, 2006). Although profiles developed on basaltic materials are still new (Quaternary age), the evaluation of weathering indices was performed with the objective of showing basaltic material at an early stage of weathering.…”

Section: Chemical Weathering Indices 10mentioning

confidence: 99%

Geochemical mass-balance, weathering and evolution of soils formed on a Quaternaryage basaltic toposequences

Şenol

Tunçay²,

Dengi̇z

2016

Preprint

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Abstract. The purpose of this research is to assess the geochemical mass-balance and weathering intensity of Typic Haplustert and Lithic Ustorthent soils represented by four profiles that developed in a Quaternary-age basaltic toposequence under semi-humid conditions in the central Black Sea region of Turkey. The researchers employed mass-balance analysis with a view to measuring elemental gains and losses along with alterations concerning the soils formed on the basaltic parent material. For this end, geochemical properties, elemental mass-balance changes and certain physicochemical features were identified to benchmark the weathering levels of the profiles. Lithic Ustorthents are distinguished by having a rough texture along with a low organic substance ingredient, whereas Typic Haplusterts have a high clay texture with low bulk density and slickenside features. X-ray diffraction showed that smectites were the prevailing minerals inside the Typic Haplusterts, while a significant amount of kaolinite and illite was observed in the Lithic Ustorthents. Mass-balance computations indicated that massive mineral weathering resulted in substantial Si losses through leaching as well as an exchange of cations, such as Na&plus;, K&plus;, Ca2&plus; and Mg2&plus;, particularly from the upper horizons. The study also took into account other features such as the pedogenic evolution of soils using weathering indices such as CIA, CIW, bases/R2O3, WIP, P and PIA. According to the results, CIA, CIW, PIA, P, WIP and bases/R2O3 index values of all soils varied between 42.33 to 73.83, 44.46 to 80.43, 37.53 to 65.63, 75.39 to 84.31 and 0.45 to 1.27 respectively, to solum depth. This result indicated that soils classified as Entisol and Vertisol have similar pedochemical properties. In spite of similar weathering rates, the soils were classified under different groups as a result of erosion. This showed that the conditions for soil development in the studied area had a far more impact on weathering and elemental loss than the parent material on the site.

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Section: Chemical Weathering Indices 10mentioning

confidence: 99%

Geochemical mass-balance, weathering and evolution of soils formed on a Quaternaryage basaltic toposequences

Şenol

Tunçay²,

Dengi̇z

2016

Preprint

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“…Presenta una función similar al índice IAQ, salvo que para su cálculo sólo se utilizan proporciones atómicas de elementos móviles, incluyendo Mg ++ . Estas características permiten que el índice sea recomendable para medir la movilidad, acumulación y pérdida de bases a través de los horizontes de perfil (Souri et al, 2006).…”

Section: íNdice De Parker (Ip)unclassified

Morfogénesis, procesos y evolución del horizonte Bw cámbico en tefrapaleosuelos del volcán Nevado de Toluca

Jasso-Castañeda¹,

Gama-Castro²,

Solleiro‐Rebolledo³

et al. 2012

BSGM

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Resumen La presencia de un horizonte Bw cámbico en el perfil de un paleosuelo reviste una importancia particular en las ciencias de la Tierra debido a la información ambiental y cronológica contenida en su memoria. La interpretación de esa información coadyuva a la reconstrucción paleoambiental y paleoclimática de un sitio, indicando, además, la presencia de los diferentes ciclos de estabilidad del paisaje y procesos pedológicos ocurridos durante el desarrollo del horizonte Bw. Particularmente, en este trabajo se plantea diagnosticar en una secuencia de paleosuelos: (i) el grado de desarrollo macro y micromorfológico alcanzado por los horizontes Bw; (ii) los procesos pedogenéticos básicos que propiciaron su formación; y (iii) los principales procesos tipogenéticos que determinaron su desarrollo y evolución. Para ello fueron seleccionados cuatro tefra-paleosuelos ubicados en el pedimento norte del volcán Nevado de Toluca, en las localidades denominadas como Arroyo la Ciervita (A.C.) y Zacango (Z.). Estos paleosuelos, denominados como PT1, PT2, PT3 y PT4, muestran en su perfil, horizontes Bw. Dichos horizontes se caracterizan por una composición química y mineralógica similar. Sus edades absolutas (14 C) oscilan de 13480 años AP a probablemente > 40000 años AP. La metodología empleada se basa en determinar de modo cualitativo y cuantitativo los rasgos morfológicos y propiedades asociadas que son diagnósticos de los horizontes Bw. Dichas determinaciones fueron complementadas con el análisis micromorfológico, composición química elemental, así como con el uso de índices geoquímicos y relaciones químicas. Los resultados indican que los horizontes Bw presentaron un desarrollo morfopedológico que osciló de incipiente a moderado. Este desarrollo fue propiciado, inicialmente, por un intemperismo químico moderado y posteriormente por el lessivage de compuestos solubles y de partículas en suspensión, la decarbonatación, la translocación de materiales iluviales y la lixiviación moderada de bases y de hierro, manganeso y sílice. El hierro liberado formó enlaces químicos fuertes con el humus y las arcillas, generando compuestos órgano-minerales muy estables. Estos compuestos influyeron determinantemente en el desarrollo de color y estructura de los horizontes Bw. Los resultados generados permiten inferir, además, que los horizontes Bw evolucionaron en geosistemas caracterizados por presentar ciclos de estabilidad ambiental, un clima templado con variaciones en su régimen de humedad y la presencia de un bosque mixto de latifoliadas y coníferas. Bajo estas condiciones de estación y bioclimáticas, los principales procesos tipogenéticos que coadyuvaron a la evolución de los horizontes Bw, fueron la pardificación y la andosolización.

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“…-Product of Weathering Index (PWI): This index was introduced by Souri, et al (2006) to study soil weathering from different regions in Japan. They combined the PWI with the WIP to track soil weathering in a two-dimensional coordination system where the axes are Parker and Product indexes.…”

Section: Introductionmentioning

confidence: 99%

Chemical weathering of new pyroclastic deposits from Mt. Merapi (Java), Indonesia

et al. 2009

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The Java Island, Indonesia with abundant amount of pyroclastic deposits is located in the very active and dynamic Pacific Ring of Fires. Studying the geochemical weathering indices of these pyroclastic deposits is important to get a clear picture about weathering profiles on deposits resulting from the eruption of Mt. Merapi. Immediately after the first phase of the eruption (March to June 2006), moist and leached pyroclastic deposits were collected. These pyroclastic deposits were found to be composed of volcanic glass, plagioclase feldspar in various proportions, orthopyroxene, clinopyroxene, olivine, amphibole and titanomagnetite. The total elemental composition of the bulk samples (including trace elements and heavy metals) was determined by wet chemical methods and X-ray fluorescence (XRF) analyses. Weathering of the pyroclastic deposits was studied using various weathering indices. The Ruxton ratio, weathering index of Parker, Vought resudual index and chemical index of weathering of moist pyroclastic deposits were lower than those of the leached samples, but the alteration indices (chemical and plagioclase) were slightly higher in the moist compared to the leached pyroclastic deposits.

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Contribution of Parker and Product indexes to evaluate weathering condition of Yellow Brown Forest soils in Japan

Cited by 33 publications

References 19 publications

Geochemical mass-balance, weathering and evolution of soils formed on a Quaternaryage basaltic toposequences

Geochemical mass-balance, weathering and evolution of soils formed on a Quaternaryage basaltic toposequences

Morfogénesis, procesos y evolución del horizonte Bw cámbico en tefrapaleosuelos del volcán Nevado de Toluca

Chemical weathering of new pyroclastic deposits from Mt. Merapi (Java), Indonesia

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